|Publication number||US4710150 A|
|Application number||US 06/743,965|
|Publication date||Dec 1, 1987|
|Filing date||Jun 12, 1985|
|Priority date||Jun 15, 1984|
|Also published as||DE3517959A1, DE3517959C2|
|Publication number||06743965, 743965, US 4710150 A, US 4710150A, US-A-4710150, US4710150 A, US4710150A|
|Original Assignee||Glaenzer Spicer|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (11), Referenced by (22), Classifications (13), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The present invention relates to a sealing device for a universal joint comprising an annular cup surrounding each branch of a spider element of the joint and connected to a bearing ring capping the end of the associated branch, and a flexible sealing element having lips on the periphery of which there is engaged an inner circular flange of the cup.
A sealing device of this type has been disclosed in French patent No. 72 16142. Such a sealing system provides an effective protection of the bearings, but experience has shown that it is possible to improve the seal thus provided by permanently connecting the flexible sealing element having lips with each branch of the spider element (or trunnion).
For this purpose, various solutions have been envisaged.
It has first of all been proposed to adhere together the flexible sealing element having lips (usually composed of rubber), the spider element and the bearing cup. Such a solution is difficult to produce industrially owing to the use of adhesive so that it had to be abandoned.
It was then envisaged to mold the sealing element having lips on a modified bearing cup provided with anchoring means, for example in the form of teeth in a mold in which said bearing cup is inserted. Such a device would permit the interconnection of the bearing cup and the flexible sealing element but not that between the assembly of these two elements and the trunnion. This solution has also been found to be technically difficult to construct and to be of a prohibitive cost.
It was then imagined to construct the bearing cup not of a plastics material as is usually the case but of steel and to bond, that is to say to adhere, the rubber of the sealing element, to this bearing cup. In this way, the sealing element is gripped to a greater extent and it is ensured that the sealing element does not slide during the assembly. Unfortunately, this solution has the drawback of being extremely costly. Further, it results in rust on the bearing cup and the seal between the steel of the latter and that of the bearing cup is moreover of doubtful quality.
An object of the invention is therefore to provide a device affording a seal which is improved over that obtained with the known arrangements, this device being relatively simple to produce on an industrial scale and of low price.
According to the invention, the cup comprises a skirt which is preferably cylindrical and caps with a gripping effect a flange of the corresponding branch of the spider element, said skirt extending in a direction substantially perpendicular to an inner circular flange of the cup.
The presence of this skirt permits a decrease in the gripping effect exerted on the sealing element by the inner flange of the cup and therefore limits the deformation of the sealing element having lips occurring upon assembly and consequently the reduction in the deflection of the sealing element having lips and the "rating" of the seal, i.e. the pressure beyond which the lubricant escapes from the interior of the bearing cup. On the other hand, the skirt permits a transfer to the flange of the corresponding branch of the spider element of an additional maintenance of the cup as concerns rotation which provides a more effective seal while it permits a reduction in the interference between the sealing element having lips and the inner flange of the cup, i.e. the extent of overlapping between these two parts.
There is thus obtained a more satisfactory mounting of the sealing element having lips, the prescribed deflections of which may be conformed to (the deflection of the sealing element being defined by the difference between the levels of the lips in the free state and in the stressed state produced by the bearing after assembly).
Other features and advantages of the invention will be apparent from the following description with reference to the accompanying single FIGURE which illustrates one embodiment by way of a non-limiting example.
The FIGURE is an axial sectional view to an enlarged scale of a branch of a spider element of a universal joint provided with a sealing device according to the invention.
The universal joint partly shown in the drawing comprises a spider element having four branches 1, only one of which has been shown. This branch has, in the vicinity of its end, a circular flange 2 and is capped by a bearing ring 3 with interposition of a ring arrangement of needle bearings 4. Each spider element is provided with an axial passageway filled with lubricant and communicating with the cavity for the needle bearings 4, a lubricant retaining element 5 which is conventional being disposed inside each branch 1. In operation, the bearing ring 3 undergoes an alternating (oscillating) movement of rotation relative to the trunnion 1. The device provided for affording a seal between each branch 1 of the spider element and the corresponding bearing ring 3 comprises an annular cup 6 surrounding each branch 1, and a flexible sealing element 7 which is usually made from rubber and includes a V-shaped annular recess between lips 7a, 7b applied around the branch 1 between the flange 2 and the bearing ring 3.
The cup 6 is provided with an inner circular flange 8 radially engaged with the periphery of the sealing element 7 in the V-shaped annular recess between the lips 7a, 7b of which it is engaged.
According to the invention, the cup 6 comprises a skirt 9 which perferably has a cylindrical inner surface which caps with a gripping effect by its base the flange 2 of the corresponding branch 1 of the spider element. This skirt 9 extends in a direction substantially perpendicular to the general plane of the inner circular flange 8 and is therefore parallel to the axis of the branch 1. Further, means are provided for fixing the sealing element 7 to the cup 6, namely, in the presently-described embodiment, points or lugs 11 extend perpendicularly from a surface of the inner flange 8 and are embedded in the rubber of the sealing element 7.
The technical effect of this sealing device is the following:
Owing to its gripping effect on the flange 2 and to the lugs 11, the skirt 9 positively prevents any rotation of the sealing element 7 having lips 7a, 7b with respect to the branch 1 of the spider element.
Consequently, the lip 7b of the sealing element 7 will only have to ensure a static sealing which is moreover reinforced by the presence of the skirt 9, which itself constitutes additional barrier against the introduction of foreign bodies carried along by the centrifugal force produced by the rotation of the joint.
The dynamic seal, i.e. with rotation of the sealing element 7 relative to the bearing ring 3, is solely and preferentially ensured by the lip 7a, to which the centrifugal force produced by the rotation of the joint will add an additional pressure for retaining the lubricant to that produced by the deflection "f" of the lip 7a of the sealing element 7 when mounting the bearing ring 3.
Further, this fixing of the sealing element 7 by the skirt 9 dispenses with the requirement to obtain an additional fixing by an excessive gripping of the sealing element 7 between the branch 1 and the inner flange 8. This enables the considerable parasitic deformations of the sealing element 7 to be eliminated, which deformations could be produced during its mounting on the trunnion 1 and which do not favor a good dynamic seal.
A substantially improved seal relative to that produced by the known prior art devices is thus obtained. The cup 6 may be made from any suitable plastics material, for example from "Nylon" or "Delrin" (registered trade marks).
|Cited Patent||Filing date||Publication date||Applicant||Title|
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|US3581524 *||Jul 1, 1968||Jun 1, 1971||Nadella||Sealing device for a bearing mounted on a shaft|
|US3846995 *||Feb 26, 1973||Nov 12, 1974||Glaenzer Spicer Sa||Sealing device for use in universal joints|
|FR1195688A *||Title not available|
|FR1481276A *||Title not available|
|FR2063718A5 *||Title not available|
|FR2121937A5 *||Title not available|
|FR2526509A1 *||Title not available|
|GB802491A *||Title not available|
|GB861112A *||Title not available|
|GB2112876A *||Title not available|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4874349 *||Dec 7, 1987||Oct 17, 1989||Dana Corporation||Seal and dust guard assembly for a universal joint trunnion|
|US5389039 *||Apr 14, 1993||Feb 14, 1995||The Zeller Corporation||Universal joint lubricant retainer|
|US5490021 *||Apr 5, 1994||Feb 6, 1996||U.S. Philips Corporation||Support device with a uniformly sealing locking-piece, and data storage unit provided with such a support device|
|US5588915 *||Dec 26, 1995||Dec 31, 1996||Dana Corporation||Seal and seal guard assembly for universal joint|
|US5613691 *||Jul 1, 1996||Mar 25, 1997||Unisia Jecs Corporation||Sealing device for universal joint with integral sealing lips and cover portion|
|US5813916 *||May 3, 1995||Sep 29, 1998||Meritor Heavy Vehicle Systems, Llc||Retained needle thrust washer|
|US6050899 *||May 15, 1998||Apr 18, 2000||Neapco, Inc.||Sealing system for a universal joint assembly|
|US6095925 *||Oct 10, 1997||Aug 1, 2000||Dana Corporation||Seal assembly and seal guard for a universal joint|
|US6319131 *||Jul 29, 1999||Nov 20, 2001||Voith Turbo Gmbh & Co. Kg||Articulated arrangement for articulated shafts suitable for transmitting torque|
|US6547668 *||Mar 27, 2001||Apr 15, 2003||G. Elbe & Sohn Gmbh & Co. Kg||Labyrinth seal for a universal joint shaft|
|US6579186 *||Feb 14, 2001||Jun 17, 2003||Visteon Global Technologies, Inc.||Spider having a support surface for use in a universal joint|
|US6964613||Oct 24, 2002||Nov 15, 2005||Trw Inc.||Universal joint|
|US7044859||Dec 1, 2004||May 16, 2006||American Axle & Manufacturing, Inc.||Universal joint with friction fit and bearing cup retainer|
|US7118484 *||Dec 5, 2001||Oct 10, 2006||Nsk Ltd.||Cross joint|
|US7189162||May 11, 2006||Mar 13, 2007||American Axle & Manufacturing, Inc.||Universal joint with thrust washer|
|US7338378||Aug 3, 2004||Mar 4, 2008||Torque-Traction Technologies Llc||Retainer for universal joint bearing cups|
|US7357720||Oct 2, 2006||Apr 15, 2008||Nsk Ltd.||Cross joint|
|US7887422||Feb 15, 2011||American Axle & Manufacturing, Inc.||Universal joint with bearing cup retention mechanism|
|US20050079917 *||Dec 1, 2004||Apr 14, 2005||Menosky Marc M.||Universal joint with friction fit and bearing cup retainer|
|US20060205520 *||May 11, 2006||Sep 14, 2006||American Axle & Manufacturing, Inc.||Universal joint with thrust washer|
|US20070026951 *||Oct 2, 2006||Feb 1, 2007||Nsk Ltd.||Cross joint|
|EP1457696A1 *||Jan 24, 2004||Sep 15, 2004||AMERICAN AXLE & MANUFACTURING INC.||Universal joint with friction and bearing cup retainer|
|U.S. Classification||464/14, 277/402, 464/131, 384/486, 277/549, 277/353|
|International Classification||F16D3/41, F16D3/38, F16C33/78|
|Cooperative Classification||F16D3/385, F16C33/7809|
|European Classification||F16C33/78B4, F16D3/38B2|
|Jun 12, 1985||AS||Assignment|
Owner name: GLAENZER SPICER 10 RUE J.P. TIMBAUD, 78301 POISSY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MANGIAVACCHI, JACQUES;REEL/FRAME:004416/0350
Effective date: 19850529
|May 24, 1991||FPAY||Fee payment|
Year of fee payment: 4
|May 22, 1995||FPAY||Fee payment|
Year of fee payment: 8
|May 24, 1999||FPAY||Fee payment|
Year of fee payment: 12